This fixes the following traceback:
Traceback (most recent call last):
File "/omd/sites/test140i2/share/check_mk/web/htdocs/wato.py", line 263, in page_handler
modefunc("content")
File "/omd/sites/test140i2/share/check_mk/web/htdocs/wato.py", line 16732, in <lambda>
"newhost" : (["hosts", "manage_hosts"], lambda phase: mode_edit_host(phase, new=True, is_cluster=False)),
File "/omd/sites/test140i2/share/check_mk/web/htdocs/wato.py", line 1324, in mode_edit_host
configure_attributes(new, {hostname: host}, "host", parent = Folder.current())
File "/omd/sites/test140i2/share/check_mk/web/htdocs/wato.py", line 16587, in configure_attributes
forms.section(_u(attr.title()), checkbox=checkbox_code, id="attr_" + attrname)
File "/omd/sites/test140i2/share/check_mk/web/htdocs/forms.py", line 280, in section
name, active, attrname = checkbox
ValueError: too many values to unpack
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